	observed	calculated	calculated	calculated	calculated	calculated	reported
2024	16,464	$456,555,338	+7%	1,528,359	56	273	4.57
2023	16,310	$426,638,634	+12%	1,487,316	55	269	4.57
2022	15,913	$381,492,875	+5%	1,406,150	53	262	4.57
2021	15,699	$365,003,434	+25%	1,341,942	50	254	4.57
2020	14,759	$291,403,814	first year in data	1,088,627	44	219	4.57

Source: CMS Medicare Physician & Other Practitioners public use files (Original Medicare Part B fee-for-service). Data years 2020–2024.

By state

	observed	calculated	calculated	calculated	calculated
California	1,330	$37,818,292	118,003	51	272
Florida	1,092	$29,979,748	107,683	51	350
Texas	1,073	$24,793,317	92,834	50	249
New York	1,029	$18,294,666	58,064	36	157
Pennsylvania	835	$17,844,442	65,560	47	235
North Carolina	537	$17,515,498	64,059	72	344
Ohio	644	$13,673,706	53,049	54	229
Illinois	608	$12,982,190	50,765	58	210
New Jersey	554	$11,711,472	37,846	43	208
Washington	380	$10,522,476	37,287	60	313
Georgia	441	$10,474,614	38,581	54	292
Maryland	330	$10,342,432	34,853	66	357
Massachusetts	436	$9,637,016	37,240	56	219
South Carolina	259	$8,856,566	34,284	82	387
Indiana	371	$8,817,656	35,358	60	248

Not listed: 1 billers with an armed-forces or unknown state code (ZZ); they are in the national totals.

Not listed: 3 states with fewer than 11 billers (small cells).

Source: CMS Medicare Physician & Other Practitioners public use files (Original Medicare Part B fee-for-service). Providers placed by practice address. Data year 2021.

Top metro areas

	observed	calculated	calculated	calculated
New York-Newark-Jersey City, NY-NJ	1,105	$21,521,786	65,193	36
Philadelphia-Camden-Wilmington, PA-NJ-DE-MD	422	$9,648,992	33,126	44
Los Angeles-Long Beach-Anaheim, CA	455	$9,507,118	30,294	39
Chicago-Naperville-Elgin, IL-IN	454	$8,536,379	34,039	57
Dallas-Fort Worth-Arlington, TX	346	$8,019,605	28,428	46
Boston-Cambridge-Newton, MA-NH	341	$7,330,354	27,945	50
Washington-Arlington-Alexandria, DC-VA-MD-WV	292	$6,603,183	22,509	45
Atlanta-Sandy Springs-Roswell, GA	249	$5,808,640	20,450	49
Miami-Fort Lauderdale-West Palm Beach, FL	282	$5,753,745	20,002	40
San Francisco-Oakland-Fremont, CA	171	$5,637,425	15,892	63
Phoenix-Mesa-Chandler, AZ	233	$5,432,806	18,785	41
Baltimore-Columbia-Towson, MD	159	$4,875,589	16,735	71
Seattle-Tacoma-Bellevue, WA	201	$4,418,183	15,545	51
Indianapolis-Carmel-Greenwood, IN	148	$4,159,657	14,899	65
Detroit-Warren-Dearborn, MI	216	$3,876,063	14,637	38

Source: CMS Medicare Physician & Other Practitioners public use files (Original Medicare Part B fee-for-service). The 100 areas with the most payment among those with at least 11 billers; non-metro parts of each state are one area. Data year 2021.

Specialties billing 45385 nationally

Ambulatory Surgical Center accounts for 50% of payment for 45385 nationally in 2021, across 6 specialties on claims.

	observed	calculated	calculated	calculated	calculated	calculated
Ambulatory Surgical Center	1,748	11%	$181,092,186	50%	442,287	253
Gastroenterology	11,075	71%	$162,477,836	45%	792,163	72
General Surgery	1,496	9.5%	$8,429,024	2.3%	43,945	29
Internal Medicine	656	4.2%	$7,786,683	2.1%	37,696	57
Colorectal Surgery (Proctology)	549	3.5%	$3,827,470	1.0%	19,394	35
Family Practice	116	0.74%	$627,624	0.17%	3,124	27

Not listed: 18 specialties with fewer than 11 billers (small cells).

Source: CMS Medicare Physician & Other Practitioners public use files (Original Medicare Part B fee-for-service). Provider-level lines (fewer than 11 beneficiaries suppressed by CMS); specialty is the provider type on claims. Data year 2021.

Top billers of 45385 nationally

Named top billers are a Pro figure, and Pro is not available to buy, so this list is not shown to any account. The counts and totals by state, metro area and specialty on this page are free.

Original Medicare Part B fee-for-service only; CMS suppresses provider lines with fewer than 11 beneficiaries. How these figures are computed · Limitations